Bug 2025095 (CVE-2021-22929)

Summary:	CVE-2021-22929 tor: v2 onion service metadata leak on disk
Product:	[Other] Security Response	Reporter:	Pedro Sampaio <psampaio>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED UPSTREAM	QA Contact:
Severity:	low	Docs Contact:
Priority:	low
Version:	unspecified	CC:	lewk, mh, msaulnier, pablo, paul.wouters, rh-bugzilla, s
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	If docs needed, set a value
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2021-11-19 21:18:39 UTC	Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:	2025096, 2025097
Bug Blocks:

Description Pedro Sampaio 2021-11-19 20:46:21 UTC

tor from 0.4.5.8 before 0.4.6.8 would log v2 onion services access attempt warnings on disk excessively, allowing time-correlation.

  o Minor bugfixes (onion service, TROVE-2021-008):
    - Only log v2 access attempts once total, in order to not pollute
      the logs with warnings and to avoid recording the times on disk
      when v2 access was attempted. Note that the onion address was
      _never_ logged. This counts as a Low-severity security issue.
      Fixes bug 40474; bugfix on 0.4.5.8.

References:

https://gitlab.torproject.org/tpo/core/tor/-/issues/40474
https://gitlab.torproject.org/tpo/core/tor/-/commit/602dcd8e3774b09242787ba3b0f0e0599530638a

Comment 1 Pedro Sampaio 2021-11-19 20:46:44 UTC

Created tor tracking bugs for this issue:

Affects: epel-all [bug 2025097]
Affects: fedora-all [bug 2025096]

Comment 2 Product Security DevOps Team 2021-11-19 21:18:37 UTC

This CVE Bugzilla entry is for community support informational purposes only as it does not affect a package in a commercially supported Red Hat product. Refer to the dependent bugs for status of those individual community products.